18841799 has 4 divisors (see below), whose sum is σ = 18858360. Its totient is φ = 18825240.

The previous prime is 18841789. The next prime is 18841819. The reversal of 18841799 is 99714881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99714881 = 7 ⋅14244983.

It is a cyclic number.

It is not a de Polignac number, because 18841799 - 2²⁴ = 2064583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18841789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6437 + ... + 8894.

It is an arithmetic number, because the mean of its divisors is an integer number (4714590).

Almost surely, 2^18841799 is an apocalyptic number.

18841799 is a deficient number, since it is larger than the sum of its proper divisors (16561).

18841799 is a wasteful number, since it uses less digits than its factorization.

18841799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16560.

The product of its digits is 145152, while the sum is 47.

The square root of 18841799 is about 4340.7141117563. The cubic root of 18841799 is about 266.0974966251.

The spelling of 18841799 in words is "eighteen million, eight hundred forty-one thousand, seven hundred ninety-nine".